High Flyer, Inc., wishes to maintain a growth rate of 17.5 percent per year and a debt-equity ratio of 1.2. The profit margin is 4.2 percent, and total asset turnover is constant at 1.02. a. What is the dividend payout ratio? (A negative answer should be indicated by a minus sign. Do not round intermediate calculations and enter your answer as a percent rounded to 2 decimal places, e.g., 32.16.) b. What is the maximum sustainable growth rate for this company? (Do not round intermediate calculations and enter your answer as a percent rounded to 2 decimal places, e.g., 32.16.)